Am 13.12.23 um 20:44 schrieb Alex Deucher:
On Wed, Dec 13, 2023 at 2:32 PM Mario Limonciello
<mario.limonciello@xxxxxxx> wrote:
On 12/13/2023 13:12, Mario Limonciello wrote:
On 12/13/2023 13:07, Alex Deucher wrote:
On Wed, Dec 13, 2023 at 1:00 PM Mario Limonciello
<mario.limonciello@xxxxxxx> wrote:
Some systems with MP1 13.0.4 or 13.0.11 have a firmware bug that
causes the first MES packet after resume to fail. This packet is
used to flush the TLB when GART is enabled.
This issue is fixed in newer firmware, but as OEMs may not roll this
out to the field, introduce a workaround that will retry the flush
when detecting running on an older firmware and decrease relevant
error messages to debug while workaround is in use.
Cc: stable@xxxxxxxxxxxxxxx # 6.1+
Cc: Tim Huang <Tim.Huang@xxxxxxx>
Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/3045
Signed-off-by: Mario Limonciello <mario.limonciello@xxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_mes.c | 10 ++++++++--
drivers/gpu/drm/amd/amdgpu/amdgpu_mes.h | 2 ++
drivers/gpu/drm/amd/amdgpu/gmc_v11_0.c | 17 ++++++++++++++++-
drivers/gpu/drm/amd/amdgpu/mes_v11_0.c | 8 ++++++--
4 files changed, 32 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.c
b/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.c
index 9ddbf1494326..6ce3f6e6b6de 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.c
@@ -836,8 +836,14 @@ int amdgpu_mes_reg_write_reg_wait(struct
amdgpu_device *adev,
}
r = adev->mes.funcs->misc_op(&adev->mes, &op_input);
- if (r)
- DRM_ERROR("failed to reg_write_reg_wait\n");
+ if (r) {
+ const char *msg = "failed to reg_write_reg_wait\n";
+
+ if (adev->mes.suspend_workaround)
+ DRM_DEBUG(msg);
+ else
+ DRM_ERROR(msg);
+ }
error:
return r;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.h
b/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.h
index a27b424ffe00..90f2bba3b12b 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.h
@@ -135,6 +135,8 @@ struct amdgpu_mes {
/* ip specific functions */
const struct amdgpu_mes_funcs *funcs;
+
+ bool suspend_workaround;
};
struct amdgpu_mes_process {
diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v11_0.c
b/drivers/gpu/drm/amd/amdgpu/gmc_v11_0.c
index 23d7b548d13f..e810c7bb3156 100644
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v11_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v11_0.c
@@ -889,7 +889,11 @@ static int gmc_v11_0_gart_enable(struct
amdgpu_device *adev)
false : true;
adev->mmhub.funcs->set_fault_enable_default(adev, value);
- gmc_v11_0_flush_gpu_tlb(adev, 0, AMDGPU_MMHUB0(0), 0);
+
+ do {
+ gmc_v11_0_flush_gpu_tlb(adev, 0, AMDGPU_MMHUB0(0), 0);
+ adev->mes.suspend_workaround = false;
+ } while (adev->mes.suspend_workaround);
Shouldn't this be something like:
+ do {
+ gmc_v11_0_flush_gpu_tlb(adev, 0, AMDGPU_MMHUB0(0), 0);
+ adev->mes.suspend_workaround = false;
+ gmc_v11_0_flush_gpu_tlb(adev, 0, AMDGPU_MMHUB0(0), 0);
+ } while (adev->mes.suspend_workaround);
If we actually need the flush. Maybe a better approach would be to
check if we are in s0ix in
Ah you're right; I had shifted this around to keep less stateful
variables and push them up the stack from when I first made it and that
logic is wrong now.
I don't think the one you suggested is right either; it's going to apply
twice on ASICs that only need it once.
I guess pending on what Christian comments on below I'll respin to logic
that only calls twice on resume for these ASICs.
One more comment. Tim and I both did an experiment for this (skipping
the flush) separately. The problem isn't the flush itself, rather it's
the first MES packet after exiting GFXOFF.
Well that's an ugly one. Can that happen every time GFXOFF kicks in?
So it seems that it pushes off the issue to the next thing which is a
ring buffer test:
[drm:amdgpu_ib_ring_tests [amdgpu]] *ERROR* IB test failed on comp_1.0.0
(-110).
[drm:process_one_work] *ERROR* ib ring test failed (-110).
So maybe a better workaround is a "dummy" command that is only sent for
the broken firmware that we don't care about the outcome and discard errors.
Then the workaround doesn't need to get as entangled with correct flow.
Yeah. Something like that seems cleaner. Just a question of where to
put it since we skip GC and MES for s0ix. Probably somewhere in
gmc_v11_0_resume() before gmc_v11_0_gart_enable(). Maybe add a new
mes callback.
Please try to keep it completely outside of the TLB invalidation and VM
flush handling.
Regards,
Christian.
Alex
diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v11_0.c
b/drivers/gpu/drm/amd/amdgpu/gmc_v11_0.c in gmc_v11_0_flush_gpu_tlb():
index 23d7b548d13f..bd6d9953a80e 100644
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v11_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v11_0.c
@@ -227,7 +227,8 @@ static void gmc_v11_0_flush_gpu_tlb(struct
amdgpu_device *adev, uint32_t vmid,
* Directly use kiq to do the vm invalidation instead
*/
if ((adev->gfx.kiq[0].ring.sched.ready ||
adev->mes.ring.sched.ready) &&
- (amdgpu_sriov_runtime(adev) || !amdgpu_sriov_vf(adev))) {
+ (amdgpu_sriov_runtime(adev) || !amdgpu_sriov_vf(adev)) ||
+ !adev->in_s0ix) {
amdgpu_virt_kiq_reg_write_reg_wait(adev, req, ack,
inv_req,
1 << vmid, GET_INST(GC, 0));
return;
@Christian Koenig is this logic correct?
/* For SRIOV run time, driver shouldn't access the register
through MMIO
* Directly use kiq to do the vm invalidation instead
*/
if ((adev->gfx.kiq[0].ring.sched.ready ||
adev->mes.ring.sched.ready) &&
(amdgpu_sriov_runtime(adev) || !amdgpu_sriov_vf(adev))) {
amdgpu_virt_kiq_reg_write_reg_wait(adev, req, ack,
inv_req,
1 << vmid, GET_INST(GC, 0));
return;
}
We basically always use the MES with that logic. If that is the case,
we should just drop the rest of that function. Shouldn't we only use
KIQ or MES for SR-IOV? gmc v10 has similar logic which also seems
wrong.
Alex
DRM_INFO("PCIE GART of %uM enabled (table at 0x%016llX).\n",
(unsigned int)(adev->gmc.gart_size >> 20),
@@ -960,6 +964,17 @@ static int gmc_v11_0_resume(void *handle)
int r;
struct amdgpu_device *adev = (struct amdgpu_device *)handle;
+ switch (amdgpu_ip_version(adev, MP1_HWIP, 0)) {
+ case IP_VERSION(13, 0, 4):
+ case IP_VERSION(13, 0, 11):
+ /* avoid problems with first TLB flush after resume */
+ if ((adev->pm.fw_version & 0x00FFFFFF) < 0x004c4900)
+ adev->mes.suspend_workaround = adev->in_s0ix;
+ break;
+ default:
+ break;
+ }
+
r = gmc_v11_0_hw_init(adev);
if (r)
return r;
diff --git a/drivers/gpu/drm/amd/amdgpu/mes_v11_0.c
b/drivers/gpu/drm/amd/amdgpu/mes_v11_0.c
index 4dfec56e1b7f..84ab8c611e5e 100644
--- a/drivers/gpu/drm/amd/amdgpu/mes_v11_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/mes_v11_0.c
@@ -137,8 +137,12 @@ static int
mes_v11_0_submit_pkt_and_poll_completion(struct amdgpu_mes *mes,
r = amdgpu_fence_wait_polling(ring, ring->fence_drv.sync_seq,
timeout);
if (r < 1) {
- DRM_ERROR("MES failed to response msg=%d\n",
- x_pkt->header.opcode);
+ if (mes->suspend_workaround)
+ DRM_DEBUG("MES failed to response msg=%d\n",
+ x_pkt->header.opcode);
+ else
+ DRM_ERROR("MES failed to response msg=%d\n",
+ x_pkt->header.opcode);
while (halt_if_hws_hang)
schedule();
--
2.34.1
